51416121 has 4 divisors (see below), whose sum is σ = 68554832. Its totient is φ = 34277412.

The previous prime is 51416083. The next prime is 51416129. The reversal of 51416121 is 12161415.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 51416121 - 2⁷ = 51415993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51416129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8569351 + ... + 8569356.

It is an arithmetic number, because the mean of its divisors is an integer number (17138708).

Almost surely, 2^51416121 is an apocalyptic number.

It is an amenable number.

51416121 is a deficient number, since it is larger than the sum of its proper divisors (17138711).

51416121 is a wasteful number, since it uses less digits than its factorization.

51416121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17138710.

The product of its digits is 240, while the sum is 21.

The square root of 51416121 is about 7170.5035388040. The cubic root of 51416121 is about 371.8488445319.

Adding to 51416121 its reverse (12161415), we get a palindrome (63577536).

The spelling of 51416121 in words is "fifty-one million, four hundred sixteen thousand, one hundred twenty-one".